Annealing-furnace.



J. O. SWINDBLL.

ANNEALING FURNACE.

APPLIGATIQN FILED JULY 23,1902

Patented Jan. 5. 1909.

4 SHEETSSHEET 1 INVENTOF? J. C. SWINDELL.

ANNEALING FURNACE.

APPLICATION FILED JULY 23, 190sv Patented J an. 5, 1909.

4 SHEETS-SHEET Z INVENTOR W M m m n w am C 1w m (I. U. SWINDELL.

ANNEALING FTERNAUE.

APPLICATION rum JULY $31908 908,902. Patented Jan. 5, 1909 4 SHBETSSHBET 3 INVENTOR WITNESSES J. P. SWINDELL ANNEALING FURNACE AYPLIOATION FILED JUI-Y1908\ Patented Jan. 5, 1909.

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UNITED STATES PATENT OFFICE.

JOHN (J. SWINDELL, 0F RESERVE TOWNSHIP, ALLEGHENY COUlfIlY, PENNSYLVANIA.

ANNE ALING-FURNACE Specification of Letters Patent.

Application filed July 23,

Patented Jan. 5, 1909.

1908. Serial No. 444,876.

new and useful Annealing-F11rnacc, of which 1 the following is a full, clear, and exact descrlption, reference being had to the accompanying drawings, formii'ig part of this specication, in which Figure 1 is alongitudinal section of one form of furnace embodying my invention, the section being taken on the irregular lino l-I of Fig. 2; Fig. 2 is a horizontal section, taken on the irregular line II-ll of Fig. 1; Fig. 3 is a section of a modified form of furnace, taken on the line Ill-III of Fig. 4; Fig. 4 is a horizontal section, taken on the irregular line IV-IV of Fig. 3; Fig. 5 is a section taken on the irregular line VV of Fig. 4; and Fig. 6 is a section on the line Vl-VI of .Fig. 5.

My invention has relation to annealing furnaces of the reversing regenerative type. Heretofore,1n annealing furnaces of this type,

the circulating ports for the air and gas havebeen provided at the ends of the furnace only, the circulation of the air and gas and of the products of combustion belngfrom one end of the furnace to the other. Inasmuch as these furnaces are usually arranged to receive two or moreseries of annealing boxes arranged in parallel transverse rows, it has been imposout the furnace, and a better and more uniform annealing effect produced.

Referring to the form of my invention shown in Figs. 1 and 2 of the drawingsthe numerals 2 designate the usual air regenerating chambers at the respective ends of the f u mace, and 3 are the gas irgenerating chaInbcrs. The ports 4 and 5 leading to these chambers are controlled by the usual reversing valves 6 and 7. The furnace shown in these figures is provided with three parallel sets of tracks 8 extending fransvcrsctv ol' the furnace, and uponwhirh the annealing boxes 9 are placed, the furnace having the usual Edoors 10 at one side. Leading upwardly l from each of the air regenerating chambers 2 to the adjacent end of the furnace, are a 1 series of airports 11; and leading upwardly from each of the gas regenerating chambers 3 L to the adjacent end of the furnace, are a so- I lies of gasports 12. These air and gas ports ing across the end of the furnace, as shown in Fig. 2. Some of the air ports 11 are also provided with a branch 13 which extends longitudinally in tlc bottom wall of the furnace underneath the adjacent tracks 8, and open upwardly into the furnace chamber between the first two adjacent tracks. The gas regenerating chambers 3 are also provided with a second series of ports 14 which lead upwardly and longitudinally of the furnace, and open into the furnace chamber adjacent to the branch air ports 13. In the drawings I have shown two of the air ports 11 at each end of the furnace as provided with branch ports 14, and each of the chambers 3 as having two of the ports 14. I desire to state,how'ever, that any desired number of these ports 13 and 14 may be provided. By reason of these ports, it will be seen that I provide means for obtaining substantially as high a degree of heat at the intermediate portions of the furnace as at the end and up er portions, so that the boxes 9 are subjected to a substantially uniform heating effect on both sides and at the top.

Figs. 3, 4, 5 and 6 illustrate my invention applied to a smaller furnace, having only two tracks 15 for the annealing boxes 9. In this construction the branch air-ports 16, ;which correspond to the branch ports 13 before described, and the second series of gas ports 17, which correspond to the ports 14 of the furnace open upwardly into the central portion of the furnace chamber intermediate of the two tracks 15, and upon 0 posite sides of an intermediate partition wa 18.

For the purpose of controlling the amount ofair and gas whicltenter through the several ports, any suitable damper or valve arrangement may be provided. 1 have shown 1 for this purpose bricks or tiles 19 which can l he made to open or close any desired area of 1 these ports. By lill'hlls of these dampers. the amount of air and gas which rulers at the several ports run he (l('llllll(l ronlroll'ed.

11 and 12 are in alternate relation, extcnd-' cfore described, leading from opposite ends IOU furnace. This not only provides for obtaining a substantially unifornrhcat throughout the furnace, but it also provides for obtalning more heat, if desired, at one part of the furnace than at another part. is desirable to )l'O(l \l('0 a greater combustion at that end of the furnace where the doors are located, owing to the fact that more' or less cold air will pass tl'lese doors and a greater combustionshould be produced adjacent For instance, it

thereto in order to compensate for the cool- 1 ing action of this air.

I believe I am thefirst to provide an. annealing furnace of the reversing, regenerative type, in which the combustion takes place entirely within the combustion chamber and to distribute the combustion'at different porl tions of such chamber for the purpose described.

It will be understood that my invention is equally applicable to furnaces having more 3 than three tracks, in which case branch air and as ports will be provided toppen uppair of tracks, so that in all cases a mating effect will be obtaine at It will also ing into each end portion of t e furnacechamber, and other gas and air ports opening into the intermediate portions of said chamber between-adjacent supports, the entire combustion taking place within said chamber concurrently at the different gas and air ports; substantially as, described.

2. An annealing furnace having a pluralityof sup orts for the articles to be annealed, and al so having gas and air regenerators at each end portion thereof, ports leading fromthe regenerators into the end p0r tions of the furnace chamber, and other orts leading from the regenerators into the intermediate portion of the furnace chamber between adjacent supports, the entire combustion taking place within said chamber concurrently at the different (gas and air ports; substantially. as describe 3. An annealing furnace having air and gas regenerators at each of its ends, and proerstood that the form and arrange- -my hand.

vided with a plurality, supports for annealing boxes or other objects to be treated, a plurality of ports leading from the regenerators into each end portion of the furnace chamber, and other ports leadin from' the regenerators into the furnace c amber at points intermediate of the supports for the annealing boxes, the entire combustion taking place within said chamber concurrently at tie different gas and air-ports; s ,bstantially as described.

4. An annealing air regencrators ateach end, and provided with three parallel transversely extending an 'ports for annealingboxes or other objects being treated, air and gas ports leading into the end portions of the furnace chamber from furnace having gas and the re enerators at each end, and additional air an gas ports leading from each set of re generators, one set of such additional ports 0 ening into the furnace chamber between t ie two nearest supports, and the other set'of additional ports 0 ening into the furnace chamber between t is two supports nearest that end of the furnace, substantially as described.

5. An annealing furnace of the regenerative reversing type having a plurality'of supports for the articlesto be annealed, and also iaving a plurality of gas and air orts opening into each end portion of t e furnace chamber, other gas and air ports 0 ening into the intermediate portion of said c amber between adjacent supports, and damper means for re ulating the amount of air andgas delivcre to the furnace at the different ports; substantially as described.

6. An annealing furnace of the regenera- "tiye reversing type having a plurality of supuniform, or non-uniform, at different por-' tions of the furnace, as may be desired; substantially as described'.' L

In testimony whereof, I have hereunto set JOHN C. SWINDELL.

Witnesses:

GEO: B. BLEMING, Gno. H. PARMELEE.

orts for thearticlcs to be annealed, and also- 

